I've had a mini long-term subbing job this past week.
The past two days my 7th grade gym class has played a variation of capture the flag. I wouldn't have made them play it today, except they BEGGED that we play it again. Part of the game's mechanics involved large (3'x5') padded mats on the floor, which served as "safe zones." Because they were padded, kids liked to dive onto them head first. This resulted in a LOT of head-to-head collisions. Luckily there were no serious injuries.
Most of the classes I had were high school resource rooms. Today was the last day before winter break, and no one was giving home work. The kids pretty much just played games on the computer while I read.
I spent the day telling countering "Merry Christmas" with "Happy Winter Solstice."
The kids were confused.